Peters



(No Model.)

H. M. D. L. BABGOX.

PUMP.

Patented Jan. 12, 1886.

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I turn STATES A-TENT rricn.

PUMP.

SPECIFICATION forming part of Letters Patent No. 334,211, dated January12, 1886.

Application filed February 16, 1885. Serial No. 156,088.

To all whom it may concern:

Be it known that I, HIRAM M. D. L. BAB- COX, of San Francisco, SanFrancisco county, California, have invented a new and useful Improvementin Pumps, of which the following is a full, clear, and exactdescription.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side elevation of one of my improved pumps. Fig.2 is a sectional plan view of the same, taken through the line :10 as,Fig. 1. Fig. 3 is a sectional plan view of the same,taken through theline y y, Fig. 1.

The object of my invention is to improve the construction of the pumpsfor which Letters Patent No.284, 708 were issued to me September 11,1883, in such a manner as to make them more effective in operation andmore easily operative.

The invention consists of the air-chamber with a lower open end combinedwith the plunger, the upper enlarged end of the pumpcase, and theenlarged upper air-chamber with a lower open end, and of the combinationwith the foregoing parts of the working-barrel with a surrounding waterspace or chamber, substantially as hereinafter more fully set forth andclaimed.

A is the pump-case, the upper part, B, of which is enlarged, and isprovided with a discharge-spout, O. The adjacent ends of the sections AB are flanged to receive the bolts that fasten them together.

\Vithin thelower part of the case Ais placed the working-barrel D, whichis made smaller than the interior diameter of the said case A, so as toleave an annular space between the said barrel and case, as shown inFig. 1.

Below the case A is placed the cylinder E, that carries an ordinarycheck-valve, F, and which is made of the same size as the pumpcase A.The valve-cylinder E is surrounded and protected by the case G, which ismade larger than the pump-case A and valve-cylinder E,so as to leave anannular space between it and the said valve-cylinder, as shown in Fig.l.

The lower ends of the pump-case A and barrel D and the upper ends of thevalve-cylinder E and valve-cylinder case G are flanged (No model.)

to receive the bolts that fasten the said four parts together.

Within the workingbarrel D is placed the plunger H, which is providedwith an ordinary valve, I. The upper endof the plungerstem J is attachedto the cross-bar K,secured to the open lower end of the air-chamber L.The air-chamber L can be a single chamber, or it can be made in two ormore sections. In the latter case the closed upper end of each lowersection is connected to a cross-bar, K, secured in the open lower end ofthe next upper section by a short rod, M, as illustrated in Fig. 1.

The closed upper end of the upper section of the air-chamber L isconnected by a short rod, M, with a cross-bar, K, secured to the openlower end of the enlarged air-chamber L, placed in the enlarged upperpart, B, of the pump-case.

To the closed upper end of the enlarged airchamber L is pivoted thelower end of a short pump-rod, N, the upper end of which is pivoted tothe pump-lever O. The pump-lever O is pivoted at its forward end to abracket, P, attached to the upper part of the enlarged upper section, B,of the pump-case.

\Vith this construction, as the free end of the lever O is forceddownward the air-chambers are forced downward through the water in thepump-case, compressing the air in the said air-chambers, and the plungeris forced downward through the water in the workingbarrel, thecheck-valve preventing the said water from passing downward and thepressure of the water opening the plunger-valve, so that the plungerwill readily move downward through the said water. As the downwardpressure upon the free end of the pumplever ceases the compressed air inthe airchambers expands,and part of the power thus developed raises theair-chambers, the plunger,and the water in the working-barrel above saidplunger, and raises the lever for another stroke.

The balance of the power developed by the expansion of the compressedair forces the water out of the pump-case through the spout C.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a pump, the combination, with the pump-casehaving an enlarged upper end, of

the lower air-chamber connected to the plunger, and the enlargedair-chamber arranged in the enlargement at the upper end of thepumpcase, and having a lower open end, said air- 15 chambers beingconnected together, substantially as and for the purpose set forth.

HIRAM M. D. L; BABGOX.

Witnesses:

JAMES T. GRAHAM, O. SEDGWIOK.

